42621143 has 2 divisors, whose sum is σ = 42621144. Its totient is φ = 42621142.

The previous prime is 42621133. The next prime is 42621149. The reversal of 42621143 is 34112624.

42621143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42621143 - 2⁶ = 42621079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42621149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21310571 + 21310572.

It is an arithmetic number, because the mean of its divisors is an integer number (21310572).

Almost surely, 2^42621143 is an apocalyptic number.

42621143 is a deficient number, since it is larger than the sum of its proper divisors (1).

42621143 is an equidigital number, since it uses as much as digits as its factorization.

42621143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 42621143 is about 6528.4870375915. The cubic root of 42621143 is about 349.3078648379.

Adding to 42621143 its reverse (34112624), we get a palindrome (76733767).

The spelling of 42621143 in words is "forty-two million, six hundred twenty-one thousand, one hundred forty-three".